138 lines
2.4 KiB
C
138 lines
2.4 KiB
C
/*
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* Storage Device.
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*/
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typedef struct SDev SDev;
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typedef struct SDifc SDifc;
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typedef struct SDpart SDpart;
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typedef struct SDperm SDperm;
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typedef struct SDreq SDreq;
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typedef struct SDunit SDunit;
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struct SDperm {
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char* name;
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char* user;
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ulong perm;
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};
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struct SDpart {
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uvlong start;
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uvlong end;
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SDperm;
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int valid;
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ulong vers;
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};
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struct SDunit {
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SDev* dev;
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int subno;
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uchar inquiry[255]; /* format follows SCSI spec */
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uchar sense[18]; /* format follows SCSI spec */
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SDperm;
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QLock ctl;
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uvlong sectors;
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ulong secsize;
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SDpart* part; /* nil or array of size npart */
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int npart;
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ulong vers;
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SDperm ctlperm;
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QLock raw; /* raw read or write in progress */
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ulong rawinuse; /* really just a test-and-set */
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int state;
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SDreq* req;
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SDperm rawperm;
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};
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/*
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* Each controller is represented by a SDev.
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*/
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struct SDev {
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Ref r; /* Number of callers using device */
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SDifc* ifc; /* pnp/legacy */
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void* ctlr;
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int idno;
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char name[8];
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SDev* next;
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QLock; /* enable/disable */
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int enabled;
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int nunit; /* Number of units */
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QLock unitlock; /* `Loading' of units */
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int* unitflg; /* Unit flags */
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SDunit**unit;
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};
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struct SDifc {
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char* name;
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SDev* (*pnp)(void);
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SDev* (*legacy)(int, int);
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int (*enable)(SDev*);
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int (*disable)(SDev*);
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int (*verify)(SDunit*);
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int (*online)(SDunit*);
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int (*rio)(SDreq*);
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int (*rctl)(SDunit*, char*, int);
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int (*wctl)(SDunit*, Cmdbuf*);
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long (*bio)(SDunit*, int, int, void*, long, uvlong);
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SDev* (*probe)(DevConf*);
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void (*clear)(SDev*);
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char* (*rtopctl)(SDev*, char*, char*);
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int (*wtopctl)(SDev*, Cmdbuf*);
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};
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struct SDreq {
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SDunit* unit;
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int lun;
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int write;
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uchar cmd[16];
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int clen;
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void* data;
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int dlen;
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int flags;
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int status;
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long rlen;
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uchar sense[256];
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};
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enum {
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SDnosense = 0x00000001,
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SDvalidsense = 0x00010000,
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};
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enum {
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SDretry = -5, /* internal to controllers */
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SDmalloc = -4,
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SDeio = -3,
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SDtimeout = -2,
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SDnostatus = -1,
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SDok = 0,
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SDcheck = 0x02, /* check condition */
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SDbusy = 0x08, /* busy */
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SDmaxio = 2048*1024,
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SDnpart = 16,
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};
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#define sdmalloc(n) malloc(n)
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#define sdfree(p) free(p)
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/* devsd.c */
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extern void sdadddevs(SDev*);
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extern int sdsetsense(SDreq*, int, int, int, int);
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extern int sdmodesense(SDreq*, uchar*, void*, int);
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extern int sdfakescsi(SDreq*, void*, int);
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/* sdscsi.c */
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extern int scsiverify(SDunit*);
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extern int scsionline(SDunit*);
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extern long scsibio(SDunit*, int, int, void*, long, uvlong);
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extern SDev* scsiid(SDev*, SDifc*);
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